Effective early and late control of MCMV proliferation in BALB.K mice depends on NK cells, whereas CD8⁺ T cells become involved later. (A and B) BALB.K mice were depleted of NK cells (top), CD8 T cells (bottom), or both (C) before WT MCMV infection. Viral titers were assessed at different time points p.i. in the spleen (A and B, top) and liver (A and B, bottom). The data represent three pooled experiments (median viral titer ± IQR) with three to four mice per experiment.